Adaptive Dynamic Sliding Mode Control for Near Space Vehicles Under Actuator Faults
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Adaptive Dynamic Sliding Mode Control for Near Space Vehicles Under Actuator Faults Jing Zhao · Bin Jiang · Peng Shi · Hongtao Liu
Received: 10 December 2011 / Revised: 11 March 2013 © Springer Science+Business Media New York 2013
Abstract A novel adaptive dynamic sliding mode (ADSM) fault-tolerant control (FTC) methodology is developed for near space vehicle attitude control systems with actuator faults in this paper. The proposed ADSM approach combines dynamic sliding mode with adaptive control strategies that can make the systems stable and accurately track the desired signals in the presence of external disturbances, model parameter uncertainties, and even actuator faults. Firstly, the attitude dynamic model of X-33 and its faulty model are introduced, then the ADSM control and fault-tolerant control laws are designed for outer-loop and inner-loop, respectively. Finally, in comparison with one existing approach, the simulation results are provided to show the effectiveness of the proposed FTC scheme.
Keywords Fault tolerant control · Actuator faults · Near space vehicles · Dynamic sliding mode
J. Zhao · B. Jiang () College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China e-mail: [email protected] P. Shi College of Engineering and Science, Victoria University, Melbourne VIC 8001, Australia P. Shi School of Electrical and Electronic Engineering, The University of Adelaide, Adelaide SA 5005, Australia H. Liu Institute for Aerospace Studies, University of Toronto, Toronto, Canada
Circuits Syst Signal Process
1 Introduction Near space vehicle (NSV) is one kind of new aerospace vehicle, which not only can make the supersonic speed cruising flight in the atmosphere, but also can pass through the atmosphere and make the cruising flight. Compared with existing aerospace vehicles, NSV has many advantages in launch cost, maintainability, reusability, flight performance and so on. It is perceived that NSV has broad potentials in both civil and military applications. Different from traditional flight vehicle, an NSV possesses the following characteristics: multi-duties, multi-working patterns, large-scale highspeed mobile, large flight envelope and so on, whose airborne condition and flying status change very rapidly. To complete a flight mission, the entire flight process will experience four stages: subsonic, transonic, supersonic and hypersonic speed. NSV dynamics shows the serious multivariate coupling and nonlinearity. Thus, all the above-mentioned factors can lead to actuator and sensor fault of aircraft, consequently which will inevitably affect NSV attitude control, flight stability, reliability and security [32]. Therefore, the realization of fault tolerance control for fault is essentially important and practical in the aerospace industry. In the view of the definition of fault, we can give a general mathematical representation of faulty models [1, 18]. Two formulations can be chosen to represent a general faulty model: additive and multiplicative faul
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